I was wrong, it's not bioballs, looks to be something similar to ceramics. Anyways, I'm researching a few things to add to a canister and should have a list by tomorrow night. I'll start a new thread so we can find out if anyone is using them, having success/failure, so we don't waist out time & money on the ones that don't deliver as promised.
I'm not sure I want to get a bio reactor, for lack of education/experience, but I might need one once my juveniles grow out (basicly half my tank).
I have read in several articles that there is no quick/easy fix if a person wants to keep their current stock (unless the cause is only over feeding and a "dirty tank"). I say that because the most common reasons are overstocked tank, too much waiste, over feeding, and not enough tank maintenance. From what I've read, you need to try a few tactics at once, and each one helps a little, but combined they offer noticeable help. A bio reactor might make a big difference but I have NO experience with them.
Have you considered re-homing 3 of the 4 plecos? Not sure what kind you have but I switched to a BN Pleco. It should stay under 6" and is the second best algae eater/rock cleaner out there (the best can't be homed with African cichlids). It sounds like your doing good tank maintenance. A big part of the problem might be your 4 super poopers...